[Truck Guy99]

That sounds awesome man! I personally would just extend the bed to the back of the cab and put a toolbox inside of it. As for a fuel tank, I would try to move it either in the bed (with the filler neck just below the bed rail to keep out of sight but still easily accesible) and leave the old filler neck in the cab for the original look but without the cab tank, or put one between the frame rails under the bed. Not to mention having extra storage in the cab, getting rid of fumes, and adding safety in the event of a crash.